Impedance PCB Single End Impedance Controlled Circuit Board 6 Layer PCB for Vehicle Tracking System
1.1 General description
This is a type of single end impedance controlled PCB built on FR-4 substrate with Tg 150°C for the application of vehicle tracking system. As request, it's panelized 12 up with 10mm strips each board because there's parts that overhangs the board. Addtional breakout are added in line with the board, which makes it a lot easier to remove the boards from the panels after assembly. It's an impedance controlled board with 60 ohm on 6 mil single end track on signal layer 3 and layer 4. Other specifications are 1.60 mm thick with white silkscreen on both sides, green solder mask on both sides and immersion gold are on pads. The base material substrate is from ITEQ IT-158. They're fabricated per IPC 6012 Class 2 using supplied Gerber data. Each 25 panels are packed for shipment.
1.2 Features and benefits
RoHS Compliance and conformity to IPC1401/126;
Industrial standard material with high Tg (175℃ by DSC) and excellent thermal reliability;
SMT process is resistant to reflow soldering, resistant to rework;
High solderability, no stressing of circuit boards and less contamination of PCB surface;
Improved the speed of signal transmission;
AOI inspection;
Electrical test and high voltage test;
Impedance control test and solder-ability test;
8000 types of PCB per month;
1.3 Applications
GPS Navigation
Video Surveillance
Repeater WiFi
Converters
AC/DC Adaptor
Electrical Converter
GPS Car Tracking
PLC Programing
DC Converters
Heavy Copper Application
1.4 Parameter and data sheet
| PCB SIZE | 150 x 195mm=12PCS |
| BOARD TYPE | Multilayer PCB |
| Number of Layers | 6 layers |
| Surface Mount Components | YES |
| Through Hole Components | YES |
| LAYER STACKUP | copper ------- 18um(0.5oz)+plate TOP layer |
| Prepreg 0.23mm |
| copper ------- 35um(1oz) MidLayer 1 |
| FR-4 0.3mm inclusive copper |
| copper ------- 35um(1oz) MidLayer 2 |
| Prepreg 0.455mm |
| copper ------- 35um(1oz) MidLayer 3 |
| FR-4 0.3mm inclusive copper |
| copper ------- 35um(1oz) MidLayer 4 |
| Prepreg 0.23mm |
| copper ------- 18um(0.5oz)+plate BOT layer |
| TECHNOLOGY | |
| Minimum Trace and Space: | N/A |
| Minimum / Maximum Holes: | 0.5 mm / 4.05 mm |
| Number of Different Holes: | 5 |
| Number of Drill Holes: | 32 |
| Number of Milled Slots: | 48 |
| Number of Internal Cutouts: | 0 |
| Impedance Control: | Single-end impedance, 57 ohm on 8mil track of signal Layer 3 and Layer 4 |
| Number of Gold finger: | 0 |
| BOARD MATERIAL | |
| Glass Epoxy: | FR-4 Tg170℃, er<5.4.IT-180, ITEQ Supplied |
| Final foil external: | 1 oz |
| Final foil internal: | 1 oz |
| Final height of PCB: | 1.6 mm ±0.16 |
| PLATING AND COATING | |
| Surface Finish | Immersion gold (32.1% ) 0.1µm over 3µm nickel |
| Solder Mask Apply To: | TOP and Bottom, 12micron Minimum |
| Solder Mask Color: | Green, PSR-2000GT600D, Taiyo Supplied. |
| Solder Mask Type: | LPSM |
| CONTOUR/CUTTING | Routing, stamp holes. |
| MARKING | |
| Side of Component Legend | TOP and Bottom. |
| Colour of Component Legend | White, IJR-4000 MW300, Taiyo brand |
| Manufacturer Name or Logo: | Marked on the board in a conductor and leged FREE AREA |
| VIA | Plated through hole(PTH), minimum size 0.5mm. |
| FLAMIBILITY RATING | UL 94-V0 Approval MIN. |
| DIMENSION TOLERANCE | |
| Outline dimension: | 0.0059" |
| Board plating: | 0.0029" |
| Drill tolerance: | 0.002" |
| TEST | 100% Electrical Test prior shipment |
| TYPE OF ARTWORK TO BE SUPPLIED | email file, Gerber RS-274-X, PCBDOC etc |
| SERVICE AREA | Worldwide, Globally. |
1.5 Impedance printed circuit board
Definition of Characteristic Impedance
At a certain frequency, relative to a reference layer, the resistance of its high-frequency signals or electromagnetic waves in the process of transmission is called the characteristic impedance, which is the vector summation of electrical impedance, inductive reactance, capacitance resistance.
The classification of characteristic impedance
Common characteristic impedance is divided into: (1) Single ended (line) impedance; (2) Differential impedance and (3) coplanar impedance, etc.
Single ended impedance refers to the measured impedance of a single signal line. Differential impedance refers to the impedance measured between the two transmission lines with equivalent width and spacing in differential drive. Coplanar impedance refers to the impedance measured when the signal line is transmitting between its surrounding GND / VCC (the space between the signal line to GND / VCC on both sides is equal).
The Determinant Condition Required for Impedance Control
When the signal is transmitted in the PCB conductor, if the length of conductor is close to the 1/7 of the signal wavelength, then the conductor at this time becomes a signal transmission line, the other general signal transmission lines are required to be done with impedance control. Whether it is required to control the impedance in PCB production is based on the customer's requirement, if the customer requires that a certain line width need to be done with impedance control, it is required to control the impedance of the line width in production.Three basic elements of impedance match are the output impedance (the original active parts), the characteristic impedance (signal line), the input impedance (passive parts) (PCB board)
